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[1/5] drm: EDID: Remove a mess involving the number 63

Message ID 20181113171156.th4rbsvggbcjux3b@xylophone.i.decadent.org.uk (mailing list archive)
State New, archived
Headers show
Series Fixes and additions to EDID generation | expand

Commit Message

Ben Hutchings Nov. 13, 2018, 5:11 p.m. UTC 
It appears that the range of the vertical sync offset and pulse (0-63)
was typo'd as '-63)' and this led to writing code that subtracts 63
from each of the field values.  This is not the case, and all the EDID
sources counteract it by adding 63 to YOFFSET and YPULSE.  Remove the
additions and subtractions and fix the comment.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
---
 Documentation/EDID/1024x768.S  | 4 ++--
 Documentation/EDID/1280x1024.S | 4 ++--
 Documentation/EDID/1600x1200.S | 4 ++--
 Documentation/EDID/1680x1050.S | 4 ++--
 Documentation/EDID/1920x1080.S | 4 ++--
 Documentation/EDID/800x600.S   | 4 ++--
 Documentation/EDID/HOWTO.txt   | 4 ++--
 Documentation/EDID/edid.S      | 6 +++---
 8 files changed, 17 insertions(+), 17 deletions(-)
diff mbox series

Patch

diff --git a/Documentation/EDID/1024x768.S b/Documentation/EDID/1024x768.S
index 6f3e4b75e49e..ff4013e5fa49 100644
--- a/Documentation/EDID/1024x768.S
+++ b/Documentation/EDID/1024x768.S
@@ -31,8 +31,8 @@ 
 #define YBLANK 38
 #define XOFFSET 8
 #define XPULSE 144
-#define YOFFSET (63+3)
-#define YPULSE (63+6)
+#define YOFFSET 3
+#define YPULSE 6
 #define DPI 72
 #define VFREQ 60 /* Hz */
 #define TIMING_NAME "Linux XGA"
diff --git a/Documentation/EDID/1280x1024.S b/Documentation/EDID/1280x1024.S
index bd9bef2a65af..ce0e85be379e 100644
--- a/Documentation/EDID/1280x1024.S
+++ b/Documentation/EDID/1280x1024.S
@@ -31,8 +31,8 @@ 
 #define YBLANK 42
 #define XOFFSET 48
 #define XPULSE 112
-#define YOFFSET (63+1)
-#define YPULSE (63+3)
+#define YOFFSET 1
+#define YPULSE 3
 #define DPI 72
 #define VFREQ 60 /* Hz */
 #define TIMING_NAME "Linux SXGA"
diff --git a/Documentation/EDID/1600x1200.S b/Documentation/EDID/1600x1200.S
index a45101c6160c..5eeb751ebe1b 100644
--- a/Documentation/EDID/1600x1200.S
+++ b/Documentation/EDID/1600x1200.S
@@ -31,8 +31,8 @@ 
 #define YBLANK 50
 #define XOFFSET 64
 #define XPULSE 192
-#define YOFFSET (63+1)
-#define YPULSE (63+3)
+#define YOFFSET 1
+#define YPULSE 3
 #define DPI 72
 #define VFREQ 60 /* Hz */
 #define TIMING_NAME "Linux UXGA"
diff --git a/Documentation/EDID/1680x1050.S b/Documentation/EDID/1680x1050.S
index b0d7c69282b4..ec679507e33b 100644
--- a/Documentation/EDID/1680x1050.S
+++ b/Documentation/EDID/1680x1050.S
@@ -31,8 +31,8 @@ 
 #define YBLANK 39
 #define XOFFSET 104
 #define XPULSE 176
-#define YOFFSET (63+3)
-#define YPULSE (63+6)
+#define YOFFSET 3
+#define YPULSE 6
 #define DPI 96
 #define VFREQ 60 /* Hz */
 #define TIMING_NAME "Linux WSXGA"
diff --git a/Documentation/EDID/1920x1080.S b/Documentation/EDID/1920x1080.S
index 3084355e81e7..e0657af801dd 100644
--- a/Documentation/EDID/1920x1080.S
+++ b/Documentation/EDID/1920x1080.S
@@ -31,8 +31,8 @@ 
 #define YBLANK 45
 #define XOFFSET 88
 #define XPULSE 44
-#define YOFFSET (63+4)
-#define YPULSE (63+5)
+#define YOFFSET 4
+#define YPULSE 5
 #define DPI 96
 #define VFREQ 60 /* Hz */
 #define TIMING_NAME "Linux FHD"
diff --git a/Documentation/EDID/800x600.S b/Documentation/EDID/800x600.S
index 6644e26d5801..b6853b2db869 100644
--- a/Documentation/EDID/800x600.S
+++ b/Documentation/EDID/800x600.S
@@ -28,8 +28,8 @@ 
 #define YBLANK 28
 #define XOFFSET 40
 #define XPULSE 128
-#define YOFFSET (63+1)
-#define YPULSE (63+4)
+#define YOFFSET 1
+#define YPULSE 4
 #define DPI 72
 #define VFREQ 60 /* Hz */
 #define TIMING_NAME "Linux SVGA"
diff --git a/Documentation/EDID/HOWTO.txt b/Documentation/EDID/HOWTO.txt
index 835db332289b..d8cb3c24ec98 100644
--- a/Documentation/EDID/HOWTO.txt
+++ b/Documentation/EDID/HOWTO.txt
@@ -45,8 +45,8 @@  EDID:
 
 #define YPIX vdisp
 #define YBLANK vtotal-vdisp
-#define YOFFSET (63+(vsyncstart-vdisp))
-#define YPULSE (63+(vsyncend-vsyncstart))
+#define YOFFSET (vsyncstart-vdisp)
+#define YPULSE (vsyncend-vsyncstart)
 
 The CRC value in the last line
   #define CRC 0x55
diff --git a/Documentation/EDID/edid.S b/Documentation/EDID/edid.S
index ef082dcc6084..ce4b8b4a20b2 100644
--- a/Documentation/EDID/edid.S
+++ b/Documentation/EDID/edid.S
@@ -200,9 +200,9 @@  y_msbs:		.byte	msbs2(YPIX,YBLANK)
 x_snc_off_lsb:	.byte	XOFFSET&0xff
 /* Horizontal sync pulse width pixels 8 lsbits (0-1023) */
 x_snc_pls_lsb:	.byte	XPULSE&0xff
-/* Bits 7-4 	Vertical sync offset lines 4 lsbits -63)
-   Bits 3-0 	Vertical sync pulse width lines 4 lsbits -63) */
-y_snc_lsb:	.byte	((YOFFSET-63)<<4)+(YPULSE-63)
+/* Bits 7-4 	Vertical sync offset lines 4 lsbits (0-63)
+   Bits 3-0 	Vertical sync pulse width lines 4 lsbits (0-63) */
+y_snc_lsb:	.byte	(YOFFSET<<4)+YPULSE
 /* Bits 7-6 	Horizontal sync offset pixels 2 msbits
    Bits 5-4 	Horizontal sync pulse width pixels 2 msbits
    Bits 3-2 	Vertical sync offset lines 2 msbits